<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <ul class="item-list">
          <li class="item border-topbottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</li>
        </ul>
      </div>
    </div>
  </div>
</template>
<script>
  import {mapState,mapMutations} from 'vuex'
  import BScroll from 'better-scroll'
  export default {
    props:{
      hot:Array,
      cities:Object,
      letter:String
    },
    computed:{
      // ...mapState(['city'])
      ...mapState({
        currentCity:'city'
      })
    },
    name: 'CityList',
    methods:{
      handleCityClick (city) {
        //this.$store.commit("changesCity",city)
        this.changesCity(city)
        this.$router.push('./')
      },
      ...mapMutations(['changesCity'])
    },
    //监听器
    watch:{
      letter(){
        //console.log(this.letter)
        if(this.letter){
          const element= this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)
        }
      }
    },
    mounted () {
      this.scroll =new BScroll(this.$refs.wrapper)
    }
  }
</script>
<style lang="stylus" scoped>
  @import "../../../../static/css/varibles.styl"
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc

  .border-bottom
    &:before
      border-color: #ccc

  .list
    position: absolute
    overflow: hidden
    top: 1.58rem
    left: 0
    bottom: 0
    right: 0
    .button-list
      width: 100%
      overflow: hidden
      padding: 0.1rem 0.6rem 0.1rem 0.1rem
      box-sizing: border-box
      .button-wrapper
        width: 33.33%
        float: left
        .button
          text-align: center
          padding: 0.1rem 0
          margin: 0.1rem
          border: 0.02rem solid #ccc
    .title
      line-height: 0.54rem
      padding-left: 0.2rem
      background: #eee
      color: #666
      font-size: 0.26rem
    .item-list
      .item
        padding-left: .2rem
        line-height: 0.72rem
</style>
